week-2019-09-22-answer.java

// Java code for k largest elements in an array 
import java.util.Arrays; 
import java.util.Collections; 

class GFG { 
	public static void kLargest(Integer[] arr, int k) 
	{ 
		// Sort the given array arr in reverse order 
		// This method doesn't work with primitive data 
		// types. So, instead of int, Integer type 
		// array will be used 
		Arrays.sort(arr, Collections.reverseOrder()); 

		// Print the first kth largest elements 
		for (int i = 0; i < k; i++) 
			System.out.print(arr[i] + " "); 
	} 

	public static void main(String[] args) 
	{ 
		Integer arr[] = new Integer[] { 1, 23, 12, 9, 
										30, 2, 50 }; 
		int k = 3; 
		kLargest(arr, k); 
	} 
} 
// This code is contributed by Kamal Rawal